Vertical centrifugal pump.



B. KAMENSKI.

VERTICAL CENTRIFUGAL PUMP.

APPLICATION FILED JAN. 12| i915.

Patented May 30,1916.

TMB CULUMHIA PLANIJGRAPH C0.. WASHINGTON. D. c.

BASIL-KA1VIENSKL 0F MOSCOW, vrRUSSIA.

VERTICAL CENTRIFUGAL PUMP.

Specification of Letters Patent.

Patented May so, 1916.

Application filed January 12-` 1915. Serial N o. 1,797.

To all whom t may concern Be it known that I, BAsrL KAMENSKI, a subject of the Czar of Russia, residing at 19 Trubnilrovslri Pereulolr, Moscow, Russia, have invented certain new and useful Improvements in Vertical Centrifugal Pumps, of which. the following is a specification.

This invention relates to a centrifugal pump having a vertical axis, and in which the level of the fluid in the pump casing is maintained ata constant'height by means of a float controlled device.

The action of my pump is based upon the mechanical law accordingto which the centrifugal force exerted by a rotating fluid particle is proportional to its distance from the axis of rotation of the fluid. Thus, when the liquid in the case is brought into rotation the centrifugal force gradually increases from the axis o f rotation to the periphery of the liquid and thus causes the liquid to rise to a higher level at the periph- H ery than at the axis of rotation, the surface of the liquid between the highest and lowest levels forming approximately a curve having the shape of a parabola. The fluid pressure at the axis is a minimum, and the pressure at the sides is a maximum.

My invention is illustrated by the accompanying drawing, in which:

Figure 1 shows a section through the float chamber and the pump casing; and Fig. 2 shows a similar section through a modified form of apparatus.

In Fig. 1, the pump consists of a case 1, provided with a vertical axis 3, having blades or an impeller 2. The axis 3 is provided with a pulley 4 which can be rotated by any suitable means from a motor. In the middle of the bottom of the case 1, a pipe or channel S is arranged communicating with the vessel 5 containing a oat 9, and on the outer side of the case 1 a pipe 7. is arranged for the purpose of discharging the fluid from the pump. When the impeller 2 begins to rotate, the fluid flows through the pipe 7, and the quantity of fluid removed is replaced from the reservoir 5 controlled by the floating device 9. The fluid level at the axis 3 in the case 1, that is, the lowest point of the curve, will be maintained at the same height by means of the float controlled device in the vessel 5.

The liquid may be supplied either through the top or the bottom of the vessel containchamber a delivery of the liquid lthrough the pipe 7 maybe secured at a rate depend-V ent upon the speed of revolution of the impeller blades, without the well known disturbing factorswhere the pressure of the incoming liquid varies, etc. Under these conditions, the following theoretical conclusions would substantially prevail.

If the velocity *of the discharge through the outlet 7 is represented as o; and the height of the fluid at the periphery and accordingly the pressure of the fluid, as h; and the force due to gravity as g; then the height 7L of the fluid is expressed v2 h: fri The velocity of the discharge through the outlet 7 vat the side of the case 1 will equal Iv '\/2gh;

that is, t being proportional to the square of the number of revolutions, the quantity of fluid discharged by the pump is propor tional to the number of revolutions of the fluid.

In order to obtain such a technical eect the fluid level in the pump casing must be maintained at the same height, and the pump must have a vertical direction. My invention offers an apparatus complying with both these requirements.

Fig. 2 shows a modification in construction of the pump, in which the pump casing includes, also, the chamber vcontaining the float and the impeller blades rotated about this inner chamber as shown. The operation is otherwise the same as'with the structure shown in Fig. 1.

In the form of device shown in Fig. 1,

there is an upper valve 12 carried by the float, which closes when the float rises and thus cuts off the supply of incoming liquid,

and there is also a valve l2a which closes of its own weight when the float rises, so that liquid which would be supplied through the openings 6 and 61 only enters the chamber 5 when the float is Ibelow a predetermined height.

In the form of device shown in Fig. 2, there is a single valve 12a which is closed by the levers ll as the float rises and opens as the float falls.

I do not claim any special means of controlling the admission of iiuid by means of the float, as a great variety of Vsuch means may be adopted if desired.

It will be seen that the Elevel of the liquid in the {loa-t chamber is located in a horizontal plane between the upper and lower limits of the impeller blades, and that there will normally be an air space in the upper portion of both the pump casing and the float chamber.

Having thus described my invention what I claim and desire to secure by Letters Patent of the United States is z l. In a pumping apparatus of the character described, the combination with a source of liquid supply, and means for maintaining the liquid therein at a predetermined level, of a pump casing connected to said source of liquid supply, a centrifugal impeller having a vertical axis mounted in said casing, said impeller having blades projecting above and below the level of the liquid in the source of liquid supply, and an outlet from the periphery of said casing for conveying the liquid therefrom, substantially as described.

2. In a pumping apparatus of the character' described, the combination with a source of liquid supply, and a float and valve mechanism operated thereby for maintaining the liquid therein'at a predetermined level, of a pump casing connected to said source of liquid supply, a centrifugal impeller having a vertical axis mounted in said casing, said impeller having blades `projecting above and below the level of the liquid in the source of liquid supply, and an outlet from the periphery of said casing for conveying the liquid therefrom, substantially as described.

In testimony whereof I aiix my signature in presence of two witnesses.

BASIL KAMENSKI. Witnesses:

L. RLL, HARRY WHITEFLELD.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

